Since we're not able to match on characters, I would suggest to name them in your optional details for now. I'm assuming since we didn't ask for character nominations, there may not be a way to fix that for characters that don't have canonical tags. If we - meaning the mod who is better at the AO3 stuff than me - figures out how to fix that, we will let you know and you can edit your sign-up. But, for now, I would just mention them in your optional details area.